From e4fdb424964599db2e8d0ab273b6be804c6c9c12 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Wed, 2 Aug 2017 23:34:14 +0200
Subject: build.bash: implement "you need Go 1.5" lockout in pure Go

As noticed by @riking, the logic in the bash script will break
when Go 1 version numbers reach double-digits.

Instead, use a build tag "!go1.5" to cause a syntax error:

  $ /opt/go1.4.3/bin/go build
  can't load package: package github.com/rfjakob/gocryptfs:
  go1.4.go:5:1: expected 'package', found 'STRING' "You need Go 1.5 or higher to compile gocryptfs!"

Fixes https://github.com/rfjakob/gocryptfs/issues/133
---
 go1.4.go | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 go1.4.go

(limited to 'go1.4.go')

diff --git a/go1.4.go b/go1.4.go
new file mode 100644
index 0000000..939fe91
--- /dev/null
+++ b/go1.4.go
@@ -0,0 +1,5 @@
+// +build !go1.5
+
+// Cause an early compile error on Go 1.4 an lower. We need Go 1.5 for a number
+// of reasons, among them NewGCMWithNonceSize and RawURLEncoding.
+"You need Go 1.5 or higher to compile gocryptfs!"
-- 
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